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Anthropic · Model

Claude Sonnet 5 API

Claude Sonnet 5 answers at api.apmix.ai under the id below — one key and one monthly plan, on the OpenAI and Anthropic wire formats your tools already speak. No separate Anthropic account, no per-provider bill.

Model idanthropic/claude-sonnet-5ProMax
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At a glance

Provider
Anthropic
Included in
Pro, Max — from $14.99/month
Weighted-token cost
2× — a 1,000-token exchange costs 2K weighted tokens
Context window
1M tokens
Reasoning
Yes — thinks before it answers
See what each plan buys on Claude Sonnet 5

Call Claude Sonnet 5

Set the model to claude-sonnet-5 in any OpenAI- or Anthropic-compatible client. Both base URLs accept the same apmix key.

OpenAI-compatible · Chat Completions
curl https://api.apmix.ai/v1/chat/completions \
  -H "Authorization: Bearer apx_live_YOUR_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model": "claude-sonnet-5", "messages": [{"role": "user", "content": "Hello"}]}'
Anthropic-compatible · Messages
curl https://api.apmix.ai/v1/messages \
  -H "x-api-key: apx_live_YOUR_KEY" \
  -H "anthropic-version: 2023-06-01" \
  -H "Content-Type: application/json" \
  -d '{"model": "claude-sonnet-5", "max_tokens": 1024, "messages": [{"role": "user", "content": "Hello"}]}'
Setup guides for Claude Code, Codex CLI, Cursor and more

Questions about Claude Sonnet 5

Which plan includes Claude Sonnet 5?
Pro, Max. Each plan is a monthly allowance of weighted tokens shared across every model and every key; Claude Sonnet 5 counts at 2× per token.
How do I use Claude Sonnet 5 in Claude Code, Codex CLI or Cursor?
Point the tool at apmix — https://api.apmix.ai/v1 for OpenAI-compatible clients, https://api.apmix.ai for Anthropic-compatible ones — with your apmix key, and set the model to claude-sonnet-5. The Docs page has copy-paste setup for each tool.

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